1040s ke ngwagasome tšhupamabakeng ya Gregorian wa go thoma ka 1 Pherekgong 1040 ya fela ka 31 Manthole 1049. Ngwagasome 1040s o wela ngwagengkgolo wa 11.
| Ngwagakete: | Ngwagakete 2 |
| Mengwagakgolo: | Ngwagakgolo 10 – Ngwagakgolo 11 – Ngwagakgolo 12 |
| Mengwagasome: | 1010s 1020s 1030s – 1040s – 1050s 1060s 1070s |
| Mengwaga: | 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 |
| 1040s-tšago tswalanya: |